The Fermi Paradox and the Aurora Effect: Exo-civilization Settlement, Expansion, and Steady States

  title={The Fermi Paradox and the Aurora Effect: Exo-civilization Settlement, Expansion, and Steady States},
  author={J. Carroll-Nellenback and A. Frank and J. Wright and C. Scharf},
  journal={The Astronomical Journal},
  • J. Carroll-Nellenback, A. Frank, +1 author C. Scharf
  • Published 2019
  • Physics
  • The Astronomical Journal
  • We model the settlement of the galaxy by space-faring civilizations in order to address issues related to the Fermi Paradox. We explore the problem in a way that avoids assumptions about the intent and motivation of any exo-civilization seeking to settle other planetary systems. We first consider the speed of an advancing settlement via probes of finite velocity and range to determine if the galaxy can become inhabited with space-faring civilizations on timescales shorter than its age. We also… CONTINUE READING

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    Highlights of astronomy
    • 782
    the Ĝ infrared search for extraterrestrial civilizations with large energy supplies. II. Framework, strategy, and first result
    • 51
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    Discrete calculations of interstellar migration and settlement
    • 33
    The Search for Extraterrestrial Intelligence (SETI)
    • 203
    • Open Access
    SETI turns 50: five decades of progress in the search for extraterrestrial intelligence
    • 25
    A 1.1-1.9 GHz SETI Survey of the Kepler Field. I. A Search for Narrow-band Emission from Select Targets
    • 43
    • Open Access
    On the likelihood of non-terrestrial artifacts in the Solar System
    • 24
    • Open Access